Generally, if you have an idea and are wondering if any patents would interfere with it, you can ask a lawyer (pick one who knows about patents) to conduct a "right to practice" search. They will look through the existing patents to see what might affect your products, and they can also look into whether there is prior art to defeat those patents.
A lawyer should also be able to explain to you that a patent application hasn't been examined by the patent office yet, so its claims (the part you care about) are subject to change as the examiner reviews them. They can usually provide a watching service to you, to monitor the status of the application you're interested in, as it goes through the patent office.